CN2916656Y - Birefracting photon crystal optical fiber - Google Patents
Birefracting photon crystal optical fiber Download PDFInfo
- Publication number
- CN2916656Y CN2916656Y CN 200620103566 CN200620103566U CN2916656Y CN 2916656 Y CN2916656 Y CN 2916656Y CN 200620103566 CN200620103566 CN 200620103566 CN 200620103566 U CN200620103566 U CN 200620103566U CN 2916656 Y CN2916656 Y CN 2916656Y
- Authority
- CN
- China
- Prior art keywords
- core
- airport
- optical fiber
- crystal optical
- shape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 23
- 239000013078 crystal Substances 0.000 title claims abstract description 11
- 239000000835 fiber Substances 0.000 claims abstract description 43
- 239000010432 diamond Substances 0.000 claims abstract description 15
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 239000002861 polymer material Substances 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 239000011343 solid material Substances 0.000 abstract 1
- 230000010287 polarization Effects 0.000 description 17
- 239000004038 photonic crystal Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006854 communication Effects 0.000 description 2
- 230000008034 disappearance Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The utility model relates to a double-reflection photon crystal optical fiber comprising a fiber core and an envelope. The envelope is arranged outside the fiber core, and the reflection rate of envelop is lower than that of the fiber core, which is composed of an inner core and an outer core. The inner core is made of solid material, and air holes constituting outer core are evenly arranged in the shape of a diamond outside the fiber core; on the whole optical fiber end surface, every three air holes are arranged in the shape of a right triangle. The air holes constituting the envelope are eight air holes arranged in the shape of a diamond or two diamonds of the same center. Optical fiber material is silicon glass material or polymer material. Air holes on the whole optical fiber end surface are arranged in the shape of a right triangle, and only the air holes at the external core area of the optical core are in the shape of a diamond. The utility model structure can be easily realized according to the current hollow regular hexahedron column piling technology for producing crystal optical fiber.
Description
(1) technical field
The utility model relates to a kind of photonic crystal fiber, particularly a kind of photonic crystal fiber of realizing the polarization maintenance by strong birefringence effect.
(2) background technology
In common single mode optical fibres, if optical fiber is subjected to pressure effect at random perpendicular to axial direction, fiber end face will be transformed into to a certain extent oval structure by perfect circular configuration, polarization mode on two orthogonal polarization orientation is degeneracy no longer, their mode propagation constant β is slightly different, and in communication process, intercouple, the linear polarization that this mode birefringence effect can make incident changes random polarization state into after through a segment distance.In order to keep the polarization characteristic of pattern, can artificially introduce stronger birefringence, the refractive index difference of two orthogonal modess in optical fiber, making the intrinsic relatively birefringence of birefringence that causes at random in the environment is an a small amount of, therefore when light during along certain optical axis direction linear polarization, light will be kept its polarization direction in transmission course.If the polarization direction is not along certain optical axis direction, but with optical axis angle is arranged, light will experience linear polarization, elliptical polarization, linear polarization, elliptical polarization in transmission course, and then gets back to the periodic process of linear polarization.The distance that light is propagated vertically in polarization state experience one-period change procedure is called the beat length L
B,
β
XWith β
YBe the propagation constant of pattern on two orthogonal directionss, beat length is short more, and the polarization retention performance of optical fiber is just good more, and conventional polarization maintaining optical fibre has the beat length of millimeter magnitude.Refringence on also available two orthogonal directionss of birefringence power is represented B=|n
X-n
Y|, n wherein
XAnd n
YBe respectively two mode refractive index on the orthogonal directions.By fibre core is arranged to oval structure, can form B～10
-6The weak birefringence effect, cause that by inserting the Pyrex material stress birefrin can form B～10 in the symmetrical both sides of fibre core
-4Strong birefringence effect.
Photonic crystal fiber is called porous optical fiber or microstructured optical fibers again.On fiber end face, regularly arranged many air apertures are elongation vertically in background material, at air aperture of the center of optical fiber disappearance, forms the fibre core of leaded light, and the evenly distributed formation covering of peripheral air hole in background material.Fiber core refractive index is greater than covering, and this class photonic crystal fiber is to carry out leaded light by the principle of total internal reflection, and the optical mode field is limited to the central defect position substantially.Photonic crystal fiber has end face structure design feature flexibly, be designed to being arranged in of fibre core, airport asymmetric on certain two vertical direction, as described in pertinent literature, on two symmetry directions around the fibre core, introduce two very big airports, will make photonic crystal fiber produce birefringence, or as described in the disclosed patented claim of Blaz Photonics Co., Ltd (CN 1341221A), airport is different from other airport sizes and also can causes birefringence effect near the symmetrical two side areas fibre core.Pile up technology according to existing hollow positive six cylinders, introduce big airport or arrange difficulty of complicated patterns manufacture craft.
(3) summary of the invention
The purpose of this utility model is to provide the strong double refraction photo crystal optical fiber of the easier making of a kind of features simple structure.
For this reason, the utility model is taked following technical scheme:
A kind of photonic crystal fiber, comprise fibre core and covering, described covering is arranged on the fibre core outer peripheral areas, its refractive index is lower than core segment, described fibre core is made up of kernel and outer core, described kernel is made of solid background material, and the airport 1 that constitutes outer core assumes diamond in shape around kernel and arranges, and the airport 3 that constitutes covering is evenly arranged around fibre core; On whole fiber end face, per three adjacent vacant pores are the equilateral triangle structural arrangement.
The airport that constitutes outer core is eight airports that assume diamond in shape and arrange of a circle.
The airport that constitutes outer core is the airport that multi-turn assumes diamond in shape and arranges.
The airport diameter that constitutes outer core is greater than the airport diameter that constitutes covering.
The airport diameter that constitutes outer core is less than the airport diameter that constitutes covering.
Be filled with polar material in the airport of formation outer core.
The utility model has the advantages that: airport all is the equilateral triangle shape and arranges on the whole fiber end face, only be that the airport in fibre core outer core zone assumes diamond in shape and arranges, pile up technology according to existing hollow positive six cylinders of making photonic crystal fiber, realize that the utility model structure is very easy.
(4) description of drawings
Fig. 1 is the cross sectional representation of an embodiment of the utility model;
Fig. 2 is the pattern effective refractive index on two orthogonal directionss in Fig. 1 example;
Fig. 3 is that the pattern effective refractive index on two orthogonal directionss is poor in Fig. 1 example.
Fig. 4 is the cross sectional representation of second example.
(5) embodiment
Embodiment one:
With reference to accompanying drawing 1-3, a kind of photonic crystal fiber, end face structure as shown in Figure 1, comprise fibre core and covering, selecting quartz is background material 2, on the whole end face of optical fiber, and a kind of periodic arrangement that adopts the present technique field to generally acknowledge, every three adjacent airports link to each other and constitute an equilateral triangle, airport spacing Λ=2.3 microns (whole fiber end face).Center airport disappearance constitutes solid fibre core kernel by background material, has concentrated most light field energy.Eight diameters that are arranged into diamond shaped around the kernel are d
1=0.9 micron airport around forming the fibre core outer core, has less energy to be distributed in the fibre core outer core in background material in the pattern.Other diameter is d on the end face
2The uniform arrangement of=0.46 micron airport in background material forms covering.The diamond array of outer core airport causes that this optical fiber is birefringent along the refractive index difference on rhombus two diagonals.Fig. 2 is the mode chart of field, and Fig. 3 shows the pattern effective refractive index on two orthogonal directionss of 1.4 microns～1.7 micron wavebands, and Fig. 4 is the effective refractive index difference B=|n on two directions
X-n
Y|～10
-4In 1.55 microns communication windows, beat length L
B～0.5 millimeter, can be used as polarization-maintaining fiber.
Embodiment two:
The fibre core outer core assumes diamond in shape eight airport diameters that shape arranges less than the airport diameter in the covering, as shown in Figure 4.Other conditions are with embodiment one.
Embodiment three:
The airport that the fibre core outer core is arranged by a few shapes that assume diamond in shape centers on and forms, and other conditions are with embodiment one.
Embodiment four:
Airport in the fibre core outer core is filled by polar material, and other conditions are with embodiment one.
Claims (6)
1. double refraction photo crystal optical fiber, comprise fibre core and covering, described covering is arranged on the fibre core outer peripheral areas, its refractive index is lower than core segment, it is characterized in that: described fibre core is made up of kernel and outer core, described kernel is made of solid background material, and the airport that constitutes outer core assumes diamond in shape around kernel and arranges, and the airport that constitutes covering is evenly arranged around fibre core; On whole fiber end face, per three adjacent vacant pores are the equilateral triangle structural arrangement.
2. double refraction photo crystal optical fiber as claimed in claim 1, the airport that it is characterized in that constituting outer core are eight airports that assume diamond in shape and arrange of a circle.
3. double refraction photo crystal optical fiber as claimed in claim 1, the airport that it is characterized in that constituting outer core is the airport that multi-turn assumes diamond in shape and arranges.
4. double refraction photo crystal optical fiber as claimed in claim 1 is characterized in that constituting the airport diameter of outer core greater than the airport diameter that constitutes covering.
5. double refraction photo crystal optical fiber as claimed in claim 1, its feature is at the airport diameter of the airport diameter that constitutes outer core less than the formation covering.
6. double refraction photo crystal optical fiber as claimed in claim 1, its feature is filled with polar material in the airport that constitutes outer core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620103566 CN2916656Y (en) | 2006-05-12 | 2006-05-12 | Birefracting photon crystal optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620103566 CN2916656Y (en) | 2006-05-12 | 2006-05-12 | Birefracting photon crystal optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2916656Y true CN2916656Y (en) | 2007-06-27 |
Family
ID=38187570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620103566 Expired - Fee Related CN2916656Y (en) | 2006-05-12 | 2006-05-12 | Birefracting photon crystal optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2916656Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736168A (en) * | 2012-06-14 | 2012-10-17 | 燕山大学 | Metal wire filled near-diamond big air hole inner cladding polarized photon crystal fiber |
| CN102854562A (en) * | 2012-10-09 | 2013-01-02 | 天津理工大学 | High double-refraction photonic crystal fiber (PCF) |
| CN103197372A (en) * | 2013-04-12 | 2013-07-10 | 浙江工业大学 | Photon crystal optical fiber |
| CN104808285A (en) * | 2015-04-15 | 2015-07-29 | 南京邮电大学 | High double-refraction chromatic dispersion adjustable pohotonic crystal fiber |
| CN106226271A (en) * | 2016-09-12 | 2016-12-14 | 华中科技大学 | A kind of SPR PCF sensor based on helix core |
| CN106772783A (en) * | 2017-04-10 | 2017-05-31 | 南京航空航天大学 | A kind of photonic crystal fiber with close intensity multimodal Brillouin spectrum |
-
2006
- 2006-05-12 CN CN 200620103566 patent/CN2916656Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736168A (en) * | 2012-06-14 | 2012-10-17 | 燕山大学 | Metal wire filled near-diamond big air hole inner cladding polarized photon crystal fiber |
| CN102854562A (en) * | 2012-10-09 | 2013-01-02 | 天津理工大学 | High double-refraction photonic crystal fiber (PCF) |
| CN103197372A (en) * | 2013-04-12 | 2013-07-10 | 浙江工业大学 | Photon crystal optical fiber |
| CN104808285A (en) * | 2015-04-15 | 2015-07-29 | 南京邮电大学 | High double-refraction chromatic dispersion adjustable pohotonic crystal fiber |
| CN104808285B (en) * | 2015-04-15 | 2017-08-01 | 南京邮电大学 | A kind of high birefringence dispersion-tunable photonic crystal fiber |
| CN106226271A (en) * | 2016-09-12 | 2016-12-14 | 华中科技大学 | A kind of SPR PCF sensor based on helix core |
| CN106772783A (en) * | 2017-04-10 | 2017-05-31 | 南京航空航天大学 | A kind of photonic crystal fiber with close intensity multimodal Brillouin spectrum |
| CN106772783B (en) * | 2017-04-10 | 2019-02-01 | 南京航空航天大学 | A kind of photonic crystal fiber with close intensity multimodal Brillouin spectrum |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1329755C (en) | Photonic crystal fibres and production thereof | |
| CN2916656Y (en) | Birefracting photon crystal optical fiber | |
| CN102854562B (en) | High double-refraction photonic crystal fiber (PCF) | |
| CN103472527B (en) | A kind of High-birefringence low-confinement-lossphotonic photonic crystal fiber | |
| CN102736168B (en) | Metal wire filled near-diamond big air hole inner cladding polarized photon crystal fiber | |
| CN102866456A (en) | High-birefringence photonic crystal optical fiber low in limit loss | |
| CN107843953B (en) | High-birefringence large-nonlinearity photonic crystal fiber | |
| CN101464538A (en) | Photonic crystal fiber with ultra-high double refraction and ultra-low limitation loss | |
| CN101201432B (en) | Panda type high double-refraction photon crystal fiber | |
| CN101788698A (en) | Quasi-rectangular multi-core polarization-preserving fiber and manufacturing method thereof | |
| CN103454720A (en) | Photonic crystal fiber with high birefringence characteristic | |
| CN108152881A (en) | A kind of sulphur system high double-refraction photon crystal fiber in the range of 2 to 5 micron waveband | |
| CN100456061C (en) | Air conducting double-core photon band gap optical fiber | |
| CN1322344C (en) | Double refraction photo crystal optical fiber | |
| CN103197371B (en) | Birefringence photonic crystal fiber | |
| CN103323909A (en) | Small diameter polarization maintaining photonic crystal fiber | |
| JP3842659B2 (en) | Single mode photonic bandgap fiber and its glass matrix | |
| JP3825381B2 (en) | Polarization-maintaining photonic crystal fiber | |
| CN109254347A (en) | A kind of gradual change type photonic crystal polarization maintaining optical fibre | |
| JP3909014B2 (en) | Single mode photonic crystal optical fiber | |
| CN212276022U (en) | High-birefringence low-limiting-loss photonic crystal fiber | |
| CN219435083U (en) | Novel high-birefringence photonic crystal fiber | |
| CN200941121Y (en) | Photon crystal optical fiber | |
| CN109696724B (en) | Gradual change type photonic crystal polarization maintaining fiber | |
| CN103197372B (en) | Photon crystal optical fiber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070627 Termination date: 20100512 |